Information about Segments and Geographic Areas (Capital Expenditures by Segment) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Segment Reporting Information [Line Items]
Capital expenditures	$ 23,548	$ 25,139	$ 13,184
Operating Segments | Google
Segment Reporting Information [Line Items]
Capital expenditures	25,251	25,460	12,619
Operating Segments | Other Bets
Segment Reporting Information [Line Items]
Capital expenditures	281	181	493
Reconciling items
Segment Reporting Information [Line Items]
Capital expenditures	$ (1,984)	$ (502)	$ 72